Not everyone in liberal Berkeley agrees with that plan. "I think this is a manufactured crisis and our city manager is using it, using the shock doctor to try to push things, additional power that she should not have," Berkeley resident James McFadden said.

But this UC Berkeley professor, who just moved here from Charlottesville, supports the ordinance. "The people who showed up in my former hometown are violent people who don't care about the law, they don't care if you are allowed to bring weapons or not. Police need to be there to enforce the safety of our city," Moriel Vandsburger said.

One of the members of "No Marxism in America" posted on her Facebook page, "We do not start the violence, period. If attacked, we attack back, but never first."

The mayor of Berkeley is concerned that the more violent groups may join both protests.